package collection;

import java.util.*;

public class SortInteger {
    public static void main(String[] args) {

        Random rand = new Random();
        List<Integer> list = new ArrayList<>();
        for (int i = 0; i <10;i++){
            list.add(rand.nextInt(100));
        }
        System.out.println("list原始数据:"+list); //无序

        Collections.sort(list); //自然排序(从小到大)
        System.out.println("list排序后数据:"+list); //有序(小到大)

        Collections.reverse(list); //反转list集合(数据已经改变了)
        System.out.println("list反转后的数据:"+list);
        System.out.println(list.get(0)); //输出第1个元素
    }
}